diff options
Diffstat (limited to 'net/chrony/DETAILS')
| -rwxr-xr-x | net/chrony/DETAILS | 18 |
1 files changed, 12 insertions, 6 deletions
diff --git a/net/chrony/DETAILS b/net/chrony/DETAILS index 8b4af4d8ed..433c022e4a 100755 --- a/net/chrony/DETAILS +++ b/net/chrony/DETAILS @@ -14,25 +14,30 @@ cat << EOF Chrony can be used to keep your computer clock in step with the true time (actually UTC), and/or to keep a network of computers in time with one another. -To keep in step with true time, your computer has to have a reference to look at. +To keep in step with true time, your computer has to have a reference to +look at. This could be one of the following: * Network time protocol (NTP) server. The Internet contains a large number of NTP servers which themselves are referenced to UTC (via other servers or directly connected hardware clocks). If you can find and get access to one or more NTP servers you will be able to - configure Chronyd to synchronise your computer with them. Chronyd can also act + configure Chronyd to synchronise your computer with them. Chronyd can + also act as an NTP server in its own right. * Your wristwatch. If all else fails, you can periodically use chronyc to tell chronyd the true - time, by typing it into your keyboard and pressing Return at the correct epoch. + time, by typing it into your keyboard and pressing Return at the correct + epoch. chronyd will work out the average rate at which your computer clock loses or gains time, and compensate accordingly the rest of the time. - Obviously, the accuracy of this method is rather limited, but it can be used if + Obviously, the accuracy of this method is rather limited, but it can be + used if you have an isolated network of computers where the primary requirement is to - keep the computers synchronised together, with only a secondary requirement to + keep the computers synchronised together, with only a secondary requirement + to have them report the true time of day. * Hardware reference clock. @@ -45,7 +50,8 @@ This could be one of the following: turned off) at boot time to restart Chronyd with a good estimate of the true time. This is done by working out how much time the RTC gains or loses over a certain period, and using this information to correct the RTC reading at the - next boot. This is useful for machines that are only powered up while they are + next boot. This is useful for machines that are only powered up while + they are being used. The other major feature is if you have an intermittent (e.g. dial-up) |